Before buying a single subject or subject combo, look at the price of a full grade. For example, language arts & Bible in 5th grade would be $509 for books and lessons. For $826, you could get books and lessons for EVERY subject—language arts, Bible, arithmetic, science, history, and art.

That’s $317 more for 3 more subjects + art—the best value. (The difference comes out to only $1.86 more a day.)*